/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package tf2autoreplay;

import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;
import java.io.IOException;
import java.io.PrintWriter;
import java.lang.reflect.Type;
import java.util.Collection;
import javax.servlet.ServletException;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class CookieUpdate extends HttpServlet {

    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        try {
            Cookie[] cookies = request.getCookies();
            Cookie viewedCookie = null;
            for ( int i = 0; cookies != null && i < cookies.length; i++ ) {
                if ( cookies[i].getName().equals("TF2ReplayViews")) {
                    viewedCookie = cookies[i];
                }
            }
            if ( viewedCookie == null ) {
                viewedCookie = new Cookie("TF2ReplayViews","[]");
                viewedCookie.setMaxAge(240000);
            }
            Gson gson = new Gson();
            Type collectionType = new TypeToken<Collection<String>>(){}.getType();
            Collection<String> viewedIds = gson.fromJson(viewedCookie.getValue(), collectionType);
            if ( request.getParameter("id") != null ) {
                String toAdd = request.getParameter("id");
                boolean exists = false;
                for ( String viewId : viewedIds ) {
                    if ( viewId.equals(toAdd) ) {
                        exists = true;
                    }
                }
                if ( !exists ) {
                    viewedIds.add(request.getParameter("id"));
                }
            }
            String jsonArrayStringValue = gson.toJson(viewedIds);
            viewedCookie.setValue(jsonArrayStringValue);
            response.addCookie(viewedCookie);
            response.setStatus(200);
            out.print(jsonArrayStringValue);
        } finally {
            out.close();
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
